KR980002662A - Exhaust purification method and apparatus - Google Patents

Exhaust purification method and apparatus Download PDF

Info

Publication number
KR980002662A
KR980002662A KR1019970024994A KR19970024994A KR980002662A KR 980002662 A KR980002662 A KR 980002662A KR 1019970024994 A KR1019970024994 A KR 1019970024994A KR 19970024994 A KR19970024994 A KR 19970024994A KR 980002662 A KR980002662 A KR 980002662A
Authority
KR
South Korea
Prior art keywords
fuel ratio
absorbent
air
exhaust
exhaust gas
Prior art date
Application number
KR1019970024994A
Other languages
Korean (ko)
Other versions
KR100202995B1 (en
Inventor
나오또 스즈끼
다까아끼 이또오
유끼오 기누가사
Original Assignee
와다 아키히로
도요타 지도샤 가부시키가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 와다 아키히로, 도요타 지도샤 가부시키가이샤 filed Critical 와다 아키히로
Publication of KR980002662A publication Critical patent/KR980002662A/en
Application granted granted Critical
Publication of KR100202995B1 publication Critical patent/KR100202995B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/2073—Selective catalytic reduction [SCR] with means for generating a reducing substance from the exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9495—Controlling the catalytic process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/25—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ammonia generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/12—Combinations of different methods of purification absorption or adsorption, and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

흡수제 재생 조작초기에 생기는의 토출에 의하여 배기 성상이 악화되는 것을 방지한다. 내연기관의 #1기통에 접속되는 제1배기통로(141)상에 3원촉매(5)를 배치하고, 다른(#2∼4)기통에 접속되는 제2배기통로(142)상에흡수제(3)를 배치함과 동시에, 제1배기통로와 제2배기통로가 합류하는 공통배기통로(150)상에 탈질촉매(7)를 배치한다. #2∼4기통을 린공연비로 운전하여흡수제에 배기중의를 흡수시킨 후 #2∼4기통을 린치 공연비로 운전하여흡수제의 재생조작을 행한다. 재생조작 초기에는 #1기통을 리치 공연비로 운전하여, 배기중의의 일부를로 전환하여 탈질촉매에 공급한다. 이에 의하여 재생조작초기에흡수제로부터 토출되는는 탈질촉매(7)상에서와 반응하여 환원 정화된다. Absorbent Regeneration Operation The discharge property is prevented from deteriorating due to the discharge. The three-way catalyst 5 is disposed on the first exhaust passage 141 connected to the # 1 cylinder of the internal combustion engine, and on the second exhaust passage 142 connected to the other (# 2 to 4) cylinders. At the same time as the absorbent 3 is disposed, the denitration catalyst 7 is disposed on the common exhaust passage 150 where the first exhaust passage and the second exhaust passage join. Drive # 2 ~ 4 cylinders with lean fuel economy Exhausting to absorbent After absorbing water, drive # 2 ~ 4 cylinder with Lynch air-fuel ratio The regeneration operation of the absorbent is performed. At the beginning of the regeneration operation, the # 1 cylinder was operated at the rich air-fuel ratio, Part of Switch to feed the denitrification catalyst. Thereby, at the beginning of the regeneration operation Discharged from the absorbent On the denitration catalyst (7) It is reduced and purified by reaction with.

Description

배기정화방법 및 그 장치Exhaust purification method and apparatus

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 일 실시예의 개략구성을 나타낸 도.1 is a diagram showing a schematic configuration of an embodiment of the present invention.

제2도는 3원촉매의전환효율과 배기 공연비와의 관계를 나타낸 도.2 shows the three-way catalyst Figure showing the relationship between the conversion efficiency and the exhaust air-fuel ratio.

Claims (5)

린공연비의 배기를, 유입하는 배기의 공연비가린일 때에 배기중의를 흡수하고, 유입하는 배기의 공연비가 리치일 때에 흡수한를 배출, 환원 정화하는흡수제에 통과시킴으로써 상기 린공연비의 배기중의를흡수제에 흡수시키고, 이어서, 상기흡수제에 유입하는 배기를 리치공연비로 하여 상기흡수제로붜를 방출, 환원함과 동시에,흡수제를 통가한 배기에 암모니아를 공급하고, 상기 암모니아 공급후의 배기를, 배기중의 암모니아와를 반응시키는 배기정화수단에 통과시켜 상기흡수제로부터 환원되지 않고 방출된를 배기중의 암모니아와 반응시켜 환원하는 배기정화방법.When the air-fuel ratio of the influent exhaust is exhaust Absorbed when the air-fuel ratio of the incoming exhaust gas is rich To purify, reducing, exhausting By passing through the absorbent To Absorbed into an absorbent, and then The exhaust gas flowing into the absorbent is used as the rich air fuel ratio. As absorbent While releasing, reducing, Ammonia is supplied to the exhaust gas passed through the absorbent, and the exhaust gas after the ammonia supply is supplied with ammonia in the exhaust gas. Passing through the exhaust purification means for reacting Released from the absorbent without reduction A method for purifying exhaust gas by reacting with ammonia in exhaust gas. 배기통로에 배치된 유입하는 배기의 공연비가 린일 때에 배기중의를 흡수하고, 유입하는 배기의 공연비가 리치일 때에 흡수한를 방출, 환원 정화하는흡수제와, 상기흡수제 하류측의 배기통로에 배치된, 배기중의 암모니아와를 반응시키는 배기정화수단과, 상기흡수제에를 흡수시킬 때에,흡수제에 유입하는 배기의 공연비를 린으로 함과 동시에, 상기흡수제로부터 흡수한를 방출시킬 때에흡수제에 유입하는 배기의 공연비를 리치로 하는 배기공연비 조정수단과, 상기흡수제로부터 흡수한를 방출시킬 때에,흡수제 통과후 또는 상기 배기정화수단 유입전의 배기에 암모니아를 공급하는 암모니아 공급수단을 구비한 배기정화장치.When the air-fuel ratio of incoming exhaust gas arranged in the exhaust passage is lean, Absorbed when the air-fuel ratio of the incoming exhaust gas is rich Releasing, reducing and purifying Absorbents and the Ammonia in the exhaust gas disposed in the exhaust passage downstream of the absorbent Exhaust purification means for reacting the above, Absorbent When absorbing The air-fuel ratio of the exhaust gas flowing into the absorbent is lean, and the Absorbed from absorbent When releasing Exhaust air-fuel ratio adjusting means for riching the air-fuel ratio of exhaust gas flowing into the absorbent; Absorbed from absorbent When releasing And an ammonia supplying means for supplying ammonia to the exhaust after passing through the absorbent or before entering the exhaust purification means. 각각 1 또는 그 이상의 기통으로 이루어진 복수의 기통군을 가지는 내연기관의 배기정화장치에 있어서, 상기기통군중 일부의 기통군에 접속된 제1배기통로와, 상기 기통군중 다른 기통군에 접속된 제2배기통로와, 상기 제1과 제2의 배기통로가 합류하는 공통배기통로와, 상기 제1배기통로에 배치된 유입하는 배기의 공연비가 리치일 때에 배기중의의 적어도 일부를 암모니아로 전환하는 암모니아 생성수단과, 상기 제2배기통로에 배치된 유입하는 배기의 공연비가 린일 때에 배기중의를 흡수하고, 유입하는 배기의 공연비가 리치일때에 흡수한를 방출, 환원정화하는흡수제와, 상기 공통배기통로에 배치된 유입하는 배기중의와 암모니아를 반응시키는 배기정화수단과, 상기흡수제에를 흡수시킬 때에 상기 다른 기통군을 린 공연비로 운전하고, 상기흡수제로부터 흡수한를 방출시킬 때에 상기 다른 기통군리치공연비로 운전하는 제1공연비 고정수단과, 적어도 상기흡수제로부터 흡수한를방출시킬 때에 상기 일부와 기통군을 리치 공연비로 운전하는 제2공연비 조정수단을 구비한 내연기관의 배기정화장치.An exhaust gas purifying apparatus for an internal combustion engine having a plurality of cylinder groups each consisting of one or more cylinders, the exhaust gas purifying apparatus comprising: a first exhaust passage connected to some of the cylinder groups, and a second connected to another cylinder group of the cylinder groups; When the air passage of the exhaust passage, the common exhaust passage where the first and second exhaust passages join, and the air-fuel ratio of the incoming exhaust disposed in the first exhaust passage are rich, Ammonia generating means for converting at least a portion of the gas into ammonia, and when the air-fuel ratio of the incoming exhaust gas disposed in the second exhaust passage is lean, Absorbed when the air-fuel ratio of the incoming exhaust gas is rich Emitting, reducing and purifying The absorbent and the incoming exhaust gas disposed in the common exhaust passage. Exhaust purification means for reacting ammonia with the above Absorbent Driving the other cylinder group at a lean air-fuel ratio when absorbing Absorbed from absorbent First air-fuel ratio fixing means for driving at the different cylinder group-reach air-fuel ratio when discharging the gas; Absorbed from absorbent And a second air-fuel ratio adjusting means for driving the portion and the cylinder group at the rich air-fuel ratio when releasing the gas. 제3항에 있어서, 상기 제2공연비 조정수단은, 상기흡수제에를 흡수시킬 때에 상기 일부 기통군을 리치 공연비로 운전하고, 상기 제2공연비 조정수단은, 상기흡수제로부터 흡수한를 방출시킬 때에, 상기 제1공연비 조정수단이 상기 다른 기통군의 리치공연비 운전을 개시한 후 미리 정한 기간이 경과할 때까지 상기 일부 기통군을 리치공연비로 운전하고, 상기 미리 정한 기간의 경과시에 상기 일부 기통군의 운전공연비로 린 또는 이론공연비로 전환하는 배기정화장치.The method of claim 3, wherein the second air fuel ratio adjusting means, Absorbent Driving the portion of the cylinder group at the rich air-fuel ratio, and the second air-fuel ratio adjusting means includes: Absorbed from absorbent When discharging the gas, the first air fuel ratio adjusting means starts operating the rich air fuel ratio of the other cylinder group until the predetermined period of time has elapsed, so that the some cylinder group is operated at the rich air fuel ratio, and when the predetermined period has elapsed. Exhaust purifying apparatus for switching to the lean or theoretical performance ratio of the driving performance ratio of the portion of the cylinder group. 제3항에 있어서, 다시, 상기 일부 기통군을 상기 제1배기통로와 제2배기통로의 어느 한쪽에 선택적으로 접속하는 배기 전환수단과, 상기 배기전환수단과 상기 제2공연비 조정수단을 제어하여, 상기흡수제에를 흡수시킬 때에, 상기 일부의 기통군을 상기 제2배기통로에 접속함과 동시에 린 공연비로 운전하고, 상기흡수제로부터 흡수한를 방출시킬 때에 상기 일부 기통군을 상기 제1배기통로에 접속함과 동시에 리치 공연비로 운전하는 전환제어수단을 구비한 내연기관의 배기정화장치.4. The exhaust gas switching apparatus according to claim 3, further comprising exhaust switching means for selectively connecting said partial cylinder group to either one of said first exhaust passage and said second exhaust passage, and controlling said exhaust switching means and said second air-fuel ratio adjusting means. , remind Absorbent When absorbing, the part of the cylinder group is connected to the second exhaust passage and at the same time the lean air fuel ratio is driven. Absorbed from absorbent The exhaust gas purifying apparatus of the internal combustion engine provided with switching control means which connects a part of said cylinder group to the said 1st exhaust path, and operates at a rich air fuel ratio at the time of discharge | release. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019970024994A 1996-06-18 1997-06-17 Method and apparatus for purifying exhaust gas KR100202995B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15704196A JP3454334B2 (en) 1996-06-18 1996-06-18 Exhaust gas purification method and device
JP8-157041 1996-06-18

Publications (2)

Publication Number Publication Date
KR980002662A true KR980002662A (en) 1998-03-30
KR100202995B1 KR100202995B1 (en) 1999-06-15

Family

ID=15640908

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970024994A KR100202995B1 (en) 1996-06-18 1997-06-17 Method and apparatus for purifying exhaust gas

Country Status (5)

Country Link
US (1) US5778667A (en)
EP (1) EP0814241B1 (en)
JP (1) JP3454334B2 (en)
KR (1) KR100202995B1 (en)
DE (1) DE69709442T2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100349739B1 (en) * 1999-11-26 2002-08-22 현대자동차주식회사 Purification system of NOx for Diesel vehicle

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6345496B1 (en) 1995-11-09 2002-02-12 Toyota Jidosha Kabushiki Kaisha Method and device for purifying exhaust gas of an engine
US6047542A (en) * 1995-11-17 2000-04-11 Toyota Jidosha Kabushiki Kaisha Method and device for purifying exhaust gas of engine
WO1997019261A1 (en) * 1995-11-17 1997-05-29 Toyota Jidosha Kabushiki Kaisha Exhaust emission control device for internal combustion engines
JP3702544B2 (en) * 1996-03-22 2005-10-05 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
JP3713831B2 (en) * 1996-04-19 2005-11-09 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
DE19653756C2 (en) * 1996-12-20 1999-01-14 Porsche Ag New control strategy for a NOx storage
JP3456408B2 (en) * 1997-05-12 2003-10-14 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
JP3264226B2 (en) * 1997-08-25 2002-03-11 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
US6138453A (en) * 1997-09-19 2000-10-31 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for an internal combustion engine
US6148612A (en) 1997-10-13 2000-11-21 Denso Corporation Engine exhaust gas control system having NOx catalyst
DE19758018A1 (en) * 1997-12-29 1999-07-01 Volkswagen Ag Regeneration of a NOx storage catalytic converter of an internal combustion engine
DE19807935C1 (en) * 1998-02-25 1999-08-26 Siemens Ag Device for reducing the NO¶x¶ content in the exhaust gas of an internal combustion engine
DE19808382A1 (en) * 1998-02-27 1999-09-02 Volkswagen Ag Control of a NOx absorber catalytic converter
JP3470597B2 (en) * 1998-06-15 2003-11-25 日産自動車株式会社 Exhaust gas purification device for internal combustion engine
US6336320B1 (en) * 1998-07-10 2002-01-08 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for an internal combustion engine
US6289672B1 (en) * 1998-07-21 2001-09-18 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for an internal combustion engine
US6151889A (en) * 1998-10-19 2000-11-28 Ford Global Technologies, Inc. Catalytic monitoring method
DE19903533A1 (en) * 1999-01-29 2000-08-10 Degussa Process for the selective catalytic reduction of nitrogen oxides in oxygen-containing exhaust gases
JP3680611B2 (en) * 1999-02-03 2005-08-10 日産自動車株式会社 Exhaust gas purification device for internal combustion engine
DE19922961C2 (en) * 1999-05-19 2003-07-17 Daimler Chrysler Ag Emission control system with internal ammonia production for nitrogen oxide reduction
DE19922960C2 (en) * 1999-05-19 2003-07-17 Daimler Chrysler Ag Emission control system with internal ammonia production for nitrogen oxide reduction
US6354079B1 (en) * 1999-11-26 2002-03-12 Hyundai Motor Company Apparatus and method of purifying NOx in the exhaust gas of the diesel engine
US6519933B2 (en) * 2000-03-21 2003-02-18 Toyota Jidosha Kabushiki Kaisha Internal combustion engine having variable valve control system and NOx catalyst
DE10055665A1 (en) * 2000-11-10 2002-10-31 Volkswagen Ag Method and device for catalyst heating
US6550240B2 (en) * 2001-09-14 2003-04-22 Ford Global Technologies, Inc. Lean engine control with multiple catalysts
US7552583B2 (en) * 2004-11-08 2009-06-30 Caterpillar Inc. Exhaust purification with on-board ammonia production
DE10300298A1 (en) 2003-01-02 2004-07-15 Daimlerchrysler Ag Exhaust gas aftertreatment device and method
DE10349876A1 (en) 2003-10-25 2005-05-25 Daimlerchrysler Ag Process to operate the catalytic components of an automotive exhaust system in three oxidizing and reducing modes
US7213395B2 (en) 2004-07-14 2007-05-08 Eaton Corporation Hybrid catalyst system for exhaust emissions reduction
US20070068142A1 (en) * 2005-09-27 2007-03-29 Robel Wade J Engine system with low and high NOx generation algorithms and method of operating same
US7485272B2 (en) 2005-11-30 2009-02-03 Caterpillar Inc. Multi-stage system for selective catalytic reduction
US7624570B2 (en) 2006-07-27 2009-12-01 Eaton Corporation Optimal fuel profiles
US7490466B2 (en) * 2006-07-31 2009-02-17 Caterpillar Inc. Exhaust gas recirculation and selective catalytic reduction system
JP4779959B2 (en) * 2006-12-20 2011-09-28 株式会社デンソー Exhaust purification device
US7810315B2 (en) * 2007-02-20 2010-10-12 Eaton Corporation LNT regeneration strategy to reduce NOx spike
US20080196398A1 (en) * 2007-02-20 2008-08-21 Eaton Corporation HC mitigation to reduce NOx spike
US20080295494A1 (en) * 2007-05-31 2008-12-04 James Joshua Driscoll Multi-engine system with on-board ammonia production
DE102007039588B4 (en) * 2007-08-22 2010-01-21 Audi Ag Apparatus and method for purifying exhaust gases for an internal combustion engine
JP4983491B2 (en) * 2007-09-05 2012-07-25 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
US8393140B2 (en) * 2008-05-02 2013-03-12 GM Global Technology Operations LLC Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines
US8496896B2 (en) * 2008-06-27 2013-07-30 Catalytic Solutions, Inc. Zero platinum group metal catalysts
US8041498B2 (en) * 2008-08-29 2011-10-18 GM Global Technology Operations LLC Lean nitrogen oxide emission control system and method
US20100212300A1 (en) * 2009-02-25 2010-08-26 Caterpillar Inc. Exhaust Purification With On-Board Ammonia Production
US20100300078A1 (en) * 2009-05-27 2010-12-02 Gm Global Technology Operations, Inc. Exhaust After Treatment System
US8256397B2 (en) * 2010-01-18 2012-09-04 GM Global Technology Operations LLC Engine including intake vacuum management system
JP5111529B2 (en) * 2010-01-22 2013-01-09 日立オートモティブシステムズ株式会社 Control diagnosis device for internal combustion engine
US8919099B2 (en) 2011-06-10 2014-12-30 GM Global Technology Operations LLC System and method for determining an ammonia generation rate in a three-way catalyst
US9714625B2 (en) 2011-07-28 2017-07-25 GM Global Technology Operations LLC System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor
US9188071B2 (en) 2012-05-15 2015-11-17 GM Global Technology Operations LLC System and method for controlling an engine based on ammonia storage in multiple selective catalytic reduction catalysts
JPWO2013175604A1 (en) 2012-05-24 2016-01-12 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
US9511353B2 (en) 2013-03-15 2016-12-06 Clean Diesel Technologies, Inc. (Cdti) Firing (calcination) process and method related to metallic substrates coated with ZPGM catalyst
US9511350B2 (en) 2013-05-10 2016-12-06 Clean Diesel Technologies, Inc. (Cdti) ZPGM Diesel Oxidation Catalysts and methods of making and using same
US9511355B2 (en) 2013-11-26 2016-12-06 Clean Diesel Technologies, Inc. (Cdti) System and methods for using synergized PGM as a three-way catalyst
US9545626B2 (en) 2013-07-12 2017-01-17 Clean Diesel Technologies, Inc. Optimization of Zero-PGM washcoat and overcoat loadings on metallic substrate
US10233808B2 (en) 2015-12-03 2019-03-19 Cummins Emission Solutions Inc. Use of specific engine cylinders for reductant generation
US10077727B2 (en) 2016-01-13 2018-09-18 GM Global Technology Operations LLC Engine control systems and methods for nitrogen oxide reduction
US9957911B2 (en) 2016-02-18 2018-05-01 GM Global Technology Operations LLC Dedicated exhaust gas recirculation control systems and methods

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362202A (en) * 1971-01-19 1974-07-30 British Leyland Motor Corp Exhaust systems for internal combustion engines
US3767764A (en) * 1971-12-09 1973-10-23 Grace W R & Co System for removing nitrogen oxide from automotive exhaust
US3953576A (en) * 1974-02-13 1976-04-27 Standard Oil Company Maximizing conversion of nitrogen oxides in the treatment of combustion exhaust gases
US4393031A (en) * 1979-02-22 1983-07-12 Werner Henke Process for efficiently removing oxides of nitrogen from exhaust gas
FR2450946A1 (en) * 1979-03-08 1980-10-03 Peugeot DEVICE FOR PURIFYING EXHAUST GASES FROM AN EXPLOSION ENGINE
CA1298957C (en) * 1987-01-27 1992-04-21 Motonobu Kobayashi Method for removal of nitrogen oxides from exhaust gas of diesel engine
KR950012137B1 (en) * 1989-02-02 1995-10-14 닛뽄 쇼크바이 카가꾸 고오교오 가부시기가이샤 Method of removing nitrogen oxides in exhaust gases from a diesel engine
ATE148368T1 (en) * 1991-04-22 1997-02-15 Corning Inc CATALYTIC REACTOR SYSTEM
US5609026A (en) * 1991-05-16 1997-03-11 Kleenair Systems, Inc. Engine NOx reduction
US5410873A (en) * 1991-06-03 1995-05-02 Isuzu Motors Limited Apparatus for diminishing nitrogen oxides
JP2967113B2 (en) * 1991-06-12 1999-10-25 株式会社豊田中央研究所 Exhaust gas purification method
WO1993007363A1 (en) * 1991-10-03 1993-04-15 Toyota Jidosha Kabushiki Kaisha Device for purifying exhaust of internal combustion engine
JPH05168857A (en) * 1991-12-17 1993-07-02 Mitsubishi Heavy Ind Ltd Method for decreasing nitrogen oxide in combustion exhaust gas
JPH06108827A (en) * 1992-09-29 1994-04-19 Mazda Motor Corp Exhaust emission control device of engine
US5367875A (en) * 1992-12-07 1994-11-29 Coltec Industries Inc Automated catalytic reduction system
US5406790A (en) * 1992-12-11 1995-04-18 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification device for an engine
DE4315278A1 (en) * 1993-05-07 1994-11-10 Siemens Ag Method and device for metering a reducing agent into a nitrogen-containing exhaust gas
JP2985578B2 (en) * 1993-05-24 1999-12-06 日産自動車株式会社 Air-fuel ratio control device for lean burn engine
DE4334071C1 (en) * 1993-10-06 1995-02-09 Siemens Ag Process for reducing the nitrogen oxide concentration in the exhaust gas of an internal combustion engine or a combustion plant
JPH084522A (en) * 1994-06-06 1996-01-09 Hitachi Ltd Device and method for exhaust emission control of internal combustion engine
JP3119088B2 (en) * 1994-09-16 2000-12-18 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
DE4436397B4 (en) * 1994-10-12 2006-06-08 Robert Bosch Gmbh Device for aftertreatment of exhaust gases

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100349739B1 (en) * 1999-11-26 2002-08-22 현대자동차주식회사 Purification system of NOx for Diesel vehicle

Also Published As

Publication number Publication date
DE69709442T2 (en) 2002-08-14
JPH102213A (en) 1998-01-06
DE69709442D1 (en) 2002-02-07
EP0814241B1 (en) 2002-01-02
KR100202995B1 (en) 1999-06-15
EP0814241A1 (en) 1997-12-29
US5778667A (en) 1998-07-14
JP3454334B2 (en) 2003-10-06

Similar Documents

Publication Publication Date Title
KR980002662A (en) Exhaust purification method and apparatus
US6338244B1 (en) Exhaust gas purification process and apparatus with internal generation of ammonia for reducing nitrogen oxide
EP0878609B1 (en) An exhaust gas purification device for an internal combustion engine
KR100202811B1 (en) An exhaust gas purification device for an internal combustion engine
EP0950804A3 (en) Exhaust gas purification system for internal combustion engine
US7552583B2 (en) Exhaust purification with on-board ammonia production
US6082100A (en) Method for operating a multicylinder internal combustion engine
AU2003262001B2 (en) Exhaust gas clarifying device for internal combustion engine
TW372882B (en) Method and device for annihilation of the oxide pollutants in an oxygen-containing exhaust gas as well as its power-driven motor
EP0911499B1 (en) Exhaust gas purifying device for engine
EP0971104A3 (en) An exhaust gas purification device for an internal combustion engine
JP2000018026A (en) Exhaust emission control device for internal combustion engine
TW348199B (en) Method and device for purifying exhaust gas of engine
CA2235734A1 (en) Method and device for purifying exhaust gas of engine
US5647207A (en) Internal-combustion engine including a cylinder shut-off and exhaust gas catalysts
EP1026382A3 (en) Exhaust gas purification device for an engine and a/f ratio control for early activating a nox trapping catalyst
KR950033013A (en) Fuel dispersion control method and apparatus equipped with NOx catalyst
AU2001282353A1 (en) Exhaust system for lean-burn engines
US7464540B2 (en) Ammonia producing engine utilizing oxygen separation
US6823657B1 (en) Regeneration of a NOx storage catalytic converter of an internal combustion engine
RU2008105358A (en) METHOD FOR REGENERATING CATALYTIC NEUTRALIZERS-NITROGEN OXIDES
JP3419209B2 (en) Exhaust gas purification device for internal combustion engine
JPH09158722A (en) Exhaust device for single cylinder internal combustion engine
CN101131112B (en) Optimized NOx reduction system
JPH11336527A (en) Exhaust emission control device for diesel engine

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130304

Year of fee payment: 15

FPAY Annual fee payment

Payment date: 20140228

Year of fee payment: 16

FPAY Annual fee payment

Payment date: 20150224

Year of fee payment: 17

FPAY Annual fee payment

Payment date: 20160219

Year of fee payment: 18

FPAY Annual fee payment

Payment date: 20170221

Year of fee payment: 19

EXPY Expiration of term